This wide receiver is rockin' custom cleats to honor Alex Trebek on "Monday Night Football" ...
If that were a clue on "Jeopardy!", the answer would be "Who is Adam Thielen?" ... 'cause the Minnesota Vikings star decided to pay homage to the late game show host by wearing the amazing footwear for his game against the Chicago Bears on Monday.
The cleat artist, Dan "Mache" Gamache, posted pics of Thielen's new spikes for the evening ... and they're pretty incredible.